Pipe-wrench



l. W. NONNEMAN.

PIPE WRENCH.

APPLlcATIoN FILED APR. 30. 1919( Batented May 18, 1920.

UNITED STATES me. w. NONNEMAN, or wennen', OHIO, AssIGrNor, fro THE BoaiJEN A WARREN, oHIo, A CORPORATION o F oHIo.

`PATENT ormon- QMPANY, or

e PIPE-WRENCH.

vapplication fixed April so,

.shall be extremely 'simple and may be very.

cheaply constructed. The invention consists of the combinations of parts having the characteristics hereinafter explained which and cheapness. v

In the drawings, which illustrate my invention, Figure 1 is a side elevation of the wrench; F 1g. 2 `is a plan or edge fvi'ew of the same; Fig. 3 is a cross section, 'as indicated bythe line 3-3 on Fig. 1; Fig. 4 is 'a cross section at right angles to Fig. 3- of the yoke detached; Fig. 5 is a fragmene tary side elevation-.of a'portion of the lian.L dle member of the wrench. Asshownin the drawings, .my wrenc comprises vfour members, namely.: the two jaw members 1 and 10,. the yoke 20 connecting them,-and the nut connecting thev member 10 with the yoke.

' The .member 1 may be a single intefral.

bar extended to form a handle 2 whic is. preferably recessed at its opposite sides at 3 for lightness.- On the inner end of. this bar is 4 laterally enlarged, carrying teeth '.5 atts edge, and having a pair of downwardly extending wings 6 spaced apart. On

' the opposite sides of the bar are recesses 7 -with teeth 15.

formed in the upper portion just back of the head 4. Intermediately in these recesses are outwardly projecting bosses 8.: f

The other wrench member l0 has" a rectangular shank 11 provided with external threads 12 and-13 on the top and bottom respectively. `At its far end this member isV turned up in an elbow form '14 provided' The yoke member 20 `which connects the two jaw members described is a box-like structure having *two lparallel side plates 21 and cross connections 22 at the tcp and 23 at .the bottom. The-,distance between the two inner. faces of the slide walls of this" yoke is only slightly greaterthan the width such that the wings l handle is resisted l Specification' of Iletters ratent. Patented lDiary 1,8, 1920.

191e. serial No. 293,634. j

ofthejaw members and 10.. On each innerV face of the yoke. near the upper end is a pair of. cheeks 24 which leave Abetween -them a recess 25, semi-circular at the top.

When theyoke is in place thesecheeks 0c.

'cupy the recesses 7 of the bar 1,-w-hile `the space 25 is occupied by the cylindrical bosses 8 on the bar. v v

Clearance vis provided as shown in Fig. 1 between the members land 10 'and' between the lower edgesrof the cheeksof the yoke and the base of the recesses 7 and the under face allows the memberl to rock in the yoke with the bosses 8 asa pivot. On the forward edge of the yoke nearits'lower porenable this combi-ned eiciency, simplicity\y ing' openings for such a pin and-also reduce Y 'the labor in assembling the tool. 1

The nut 30 is simply a ring having an internal thread adapted to engage the threads l2 and 13 formed on the upper and lower edges of the shank 11. Externally the nut .is preferably knurled or roughened.l The nutsurrounds theshank and occupies openings 29 in the side walls of the yoke. Clear.-

`ance is provided forV it on the under side of the bar 1, which 9 in front of'it.

-In assembling the devicethe yoke is passed over the handle 2 and placed in position adjacent, to the head 4 with the cheeksengaging the'upper half of the bosses 8. The nut preferably depends at 1s placed inthe openings 29` and then4 the shank `11 is put into'the yoke and the nut `rotated to screw the shank into shownin Fig. 1.- f In the' operation of the-wrench, the nut is place, as

turned to adjust the jaw space tothat required to engage the pipe or other article i to'be turned. Then, when the pressure is Aapplied tothe handle 2 (in the upward direction in Fig. 1) the two 4jaws relatively vrock to allow the biting engagement ofsuch pipe. The'l setting of the jaws is preferably 6 do not engage tlemn c f edge of the yoke and. thus the pull on the only by the pipe, as will be well understood. The wings 6 form desirable lateral guides for the shank ofthe member 10.

In` the economical manufacture of the wrenchthe two jaw members may be drop forged, the yoke member may readily be au.

malleable casting and the nut is a simple screw machine product. The only machine work needed is on the nut and the teeth of the jaws. The parts may thus be cheaplv' fn'ade and they are very readily assembled. Having-thus described my invention, what I claim is:

l. In. a pipe wrench, Ythe combination of two`members, each having ajaw 'and a shank, one of said shanks being externally threaded, a yoke embracing the shanks, a 'nut-on the threaded shank rotatively con-v nected with the yoke, recesses formed in the opposite sides of the shank of the other member), and projections on the 'inner faces of the yoke occupying said recesses. y 2. In a pipe Wrench,the combination o f a member having va jaw and aA shank with bosses formed on the opposite sides of the l shank adjacent to one longitudinal edge thereof, a second member having a jaw and' a shank adapted -to lie adjacent to the other longitudinal edge of the shank first mentioned, a yoke embracing the two Shanks and having vcheeks formed on its inner faces where it embraces the shank first mentioned, said cheeks providing recesses occupied by the bosses, v*and a nut adjustably connecting said yoke with the second shank.

na pipe wrench, the combination of a member having a jaw and a shank with in# tegral bosses formed on the opposite sides of the shank adjacent vto "one longitudinal edgethereof, a second member having a jawv -and a shank adapted to lie adjacent to the other longitudinal edge of the sha'nkiistmentioned, a yoke embracing the two shanks and having cheeks formed on its inner faces where it embraces the shank first mentioned, said cheeks providing recessesoccupied by the bosses, said yoke having openings through its side walls transversely aliningV with the recesses between the cheeks and on directly opposite sides of the second shank,

and a nut embracing said second shank and occupying said openings.

4. n a pipe wrench, the combination of a member having a jaw and a shank, Arecesses in opposite sides ofthe shank, integrai cylindrical bosses within said recesses, a yoke eminner faces a pair of cheeks separated by a bracing the shank and having Aon each of its i recess semi-circular at the top, .said last named recesses receiving said bosses as pivots for the yoke, thesecond member havinga jaw anda shank, and a nut connecting said second member with said yoke.

5. In a pipe wrench, the combination of a member having a jaw and a shank, recesses ,in opposite sides ofthe shank, bosses formed on the sides `of the shank in said recesses, a

yoke embracing the shank and having cheeks A on itsinner faces, occupying said recesses,

and openings on each side between the cheeksoccup'ied by the bosses, a second member shank and having on eachof its inner faces a pair of cheeks separated'by a recess semicircular at the top, said recesses being oc- A cupied by said bosses, a second member hav` ing a jaw and a shank `extending through said yoke, said shank having teeth on its up,- per and lower edges, and a ring nut embrac- 'ng such teeth and occupying openings in the two sides of the yoke.

In apipe Wrench,the combination of a` member havinga shank and a head, the

'head having teeth and a pair of depending wings, another'member having a head with teeth and having a shank, said shank lying between the wings of said head, a vyoke embracing the two Shanks, the-shank which lies between' the wings beingl threaded on its upper and under edges, and a nut embracing such threaded portion and extending out` wardly through openings in the opposite sides of the yoke, thebyoke lhaving on its inner face near its upper end a pair of cheeks separated by a space and the corresponding shank having recesses in its opposite sides occupied by the cheeks and bosses occupied by the space between the cheeks.

In testimony whereof, I hereunto aiix my signature.

- IRA W. NONNEMAN 

